Smoke a cigar
In an old-school cigar bar complete with a bookshelf, a fine selection of whiskey, and an unspoken rule that the appearance of a vape pen is grounds for immediate ejection.
Joy? Sadness? Both? Let it rip. Maybe in a corner so you don't bum everybody out.
Make it to last call
Finish your drink last, then leave a big tip for being the straggler.
Watch a shitty band
Stay after and lie about how much you enjoyed it, then ask if they have CDs. Hope they say no.
Fake an accent
And keep it up all night. If somebody calls you out, double down and thicken it.
Fall in love
Deeply but briefly, as if in a dream. Or in a haze. Same thing, right?